X-Ray Tetras
The Pristella Tetra (Pristella maxillaris), also known as X-Ray Tetra, is a beautiful and peaceful characin species known for its translucent body that allows you to see its internal structures. These attractive fish feature yellow, black, and white fin markings that create a striking contrast against their see-through bodies. Hardy, easy to care for, and exceptionally peaceful, Pristella Tetras are excellent choices for community aquariums and make a unique addition to any peaceful setup.
Care Sheet – Pristella Tetra (Pristella maxillaris)
Temperament
Peaceful, social schooling fish
Best kept in groups of 8 or more for natural behavior
Adult Size
1.5–2 inches
Minimum Tank Size
20 gallons for a school
Water Parameters
Temperature: 72–82°F
pH: 6.0–7.5
Hardness: Soft to moderately hard (5–15 dGH)
Ammonia/Nitrite: 0 ppm
Nitrate: <20–30 ppm
Diet
Omnivorous
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Feed a varied diet:
High-quality micro-flakes or small pellets
Frozen or live foods: brine shrimp, daphnia
Occasional vegetable matter
Feed small amounts 1–2 times daily
Behavior & Compatibility
Excellent for peaceful community tanks
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Compatible with:
Other small tetras, rasboras, and peaceful fish
Corydoras and other bottom dwellers
Dwarf gouramis and small peaceful shrimp
Avoid large or aggressive fish
Aquarium Setup
Planted tanks with dark substrate to enhance transparency
Open swimming space in the middle levels
Moderate lighting
Clean, well-oxygenated water
Care Level
Easy
Very hardy and beginner-friendly
Lifespan
3–5 years with proper care
Special Notes
Unique translucent body that shows internal structures
Attractive yellow, black, and white fin markings
Very peaceful and excellent community fish
Schooling behavior creates beautiful synchronized movement
